New capabilities of the Zagreb ion microbeam system

Jakšić, Milko; Radović, Iva Bogdanović; Bogovać, M.; Desnica, Vladan; Fazinić, Stjepko; Karlušić, Marko; Medunić, Zvonko; Muto, Hideshi; Pastuović, Željko; Siketić, Zdravko; Skukan, Natko; Tadić, Tonči

doi:10.1016/j.nimb.2007.01.252

Cited by 98 publications

(37 citation statements)

References 6 publications

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“…A proton micro-beam [9] at the Ruder Bosković Institute in Zagreb was used to study the detector by ion beam induced charge (IBIC) and time resolved ion beam induced current (TRIBIC) [10]. It is based on a Van-de-Graaff tandem accelerator that can accelerate protons to an energy of 4.5 MeV and produce a microbeam with an FWHM of ≤ 2 µm.…”

Section: Proton Test Beammentioning

confidence: 99%

Study of cubic and hexagonal cell geometries of a 3D diamond detector with a proton micro-beam

Booth

Forcolin

Grilj

et al. 2017

Diamond and Related Materials

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A detector from single crystal synthetic diamond with conducting wires has been prepared with an improved femto-second laser process. The detector was characterised with a 4.5 MeV proton micro-beam (Ruder Bosković Institute, Zagreb). The charge collection efficiency and the transient current response have been investigated with high spatial resolution. A hexagonal and square cell geometry is investigated. Both cell geometries show full charge collection at 40V bias voltage, and little charge sharing between neighbouring cells. The experimental data is compared to a simulation and qualitative agreement is observed.

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Section: Proton Test Beammentioning

confidence: 99%

Study of cubic and hexagonal cell geometries of a 3D diamond detector with a proton micro-beam

Booth

Forcolin

Grilj

et al. 2017

Diamond and Related Materials

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“…Pulse height processing, beam scanning, and 2D map acquisition were carried out by using the Spector data acquisition software, developed at the RBI. 10 The electronic chain was calibrated using a silicon detector and a precision pulse generator, in order to compare pulse heights provided by the reference Si detector with those from the diamond device.…”

Section: Micro-beam Experimental Set-upmentioning

confidence: 99%

“…The use of diamond detectors in microdosimetry of ionbeam radiation therapy requires a detailed knowledge of the 10 in order to assess the potentiality of such a device for ion-beam radiation therapy microdosimetry. Few MeV silicon and carbon ions were used to investigate both the device spectroscopic properties and the induced radiation damage effects.…”

mentioning

confidence: 99%

Spectroscopic properties and radiation damage investigation of a diamond based Schottky diode for ion-beam therapy microdosimetry

Verona

Magrin

Solevi

et al. 2015

Journal of Applied Physics

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In this work, a detailed analysis of the properties of a novel microdosimeter based on a synthetic single crystal diamond is reported. Focused ion microbeams were used to investigate the device spectropscopic properties as well as the induced radiation damage effects. A diamond based Schottky diode was fabricated by chemical vapor deposition with a very thin detecting region, about 400 nm thick (approximately 1.4 μm water equivalent thickness), corresponding to the typical size in microdosimetric measurements. A 200 × 200 μm2 square metallic contact was patterned on the diamond surface by standard photolithography to define the sensitive area. Experimental measurements were carried out at the Ruder Boškovic′ Institute microbeam facility using 4 MeV carbon and 5 MeV silicon ions. Ion beam induced charge maps were employed to characterize the microdosimeter response in terms of its charge collection properties. A stable response with no evidence of polarization or memory effects was observed up to the maximum investigated ion beam flux of about 1.7 × 109 ions·cm−2·s−1. A homogeneity of the response about 6% was found over the sensitive region with a well-defined confinement of the response within the active area. Tests of the radiation damage effect were performed by selectively irradiating small areas of the device with different ion fluences, up to about 1012 ions/cm2. An exponential decrease of the charge collection efficiency was observed with a characteristic decay constant of about 4.8 MGy and 1 MGy for C and Si ions, respectively. The experimental data were analyzed by means of GEANT4 Monte Carlo simulations. A direct correlation between the diamond damaging effect and the Non Ionizing Energy Loss (NIEL) fraction was found. In particular, an exponential decay of the charge collection efficiency with an exponential decay as a function of NIEL is observed, with a characteristic constant of about 9.3 kGy-NIEL for both carbon and silicon ions.

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“…The proton microbeam [16] 17], so protons will stop within the diamond bulk. Data were taken at bias voltages of ±5 V, ±40 V, and ±60 V. Only array A was tested on the detector.…”

Section: Proton Test Beammentioning

confidence: 99%

Study of a 3D diamond detector with photon and proton micro-beams

Forcolin

Grilj

Hamilton

et al. 2016

Diamond and Related Materials

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To form a 3D diamond detector electrodes were produced in diamond by a femtosecond laserinduced phase transition of diamond to graphite. The process parameters were varied to study the influence on electrode resistivity and induced stress. A technique for a relative measurement of stress induced in 3D diamond detectors is described. The detector was characterised with a 15 keV photon micro-beam (Diamond Light Source, Oxford) and a 4 MeV proton micro-beam (Ruđer Bosković Institute, Zagreb). The detector shows characteristics consistent with full charge collection. Spatially resolved transient current measurements were obtained with protons for the first time, and the results were compared to simulations of the detector.

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New capabilities of the Zagreb ion microbeam system

Cited by 98 publications

References 6 publications

Study of cubic and hexagonal cell geometries of a 3D diamond detector with a proton micro-beam

Study of cubic and hexagonal cell geometries of a 3D diamond detector with a proton micro-beam

Spectroscopic properties and radiation damage investigation of a diamond based Schottky diode for ion-beam therapy microdosimetry

Study of a 3D diamond detector with photon and proton micro-beams

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